Does that depend on what we compare it to?
the reality is we will be dependent on fossil fuels for a quote a long time so is there an argument that we would be better to extract it here in the UK under high levels of environmental control rather than buy it from foreign parts where there may be no such concerns
Im not in any way disagreeing with the point you made, I just wonder about what might be the least worst option
Compared to importing it from countries that can produce it in much greater volumes than we ever could, with expenditure of much less resource overall, with much less additional environmental damage.
The marginal cost of production of Saudi oil is around $5 per barrel - the onshore southern UK equivalent marginal cost of production (from "tight oil" deposits - got by "fracking" - just like the oil Bakken in the US, but orders of magnitude smaller!) is probably around $70-90 per barrel. Even if we were to go all out for it, with massive investment, the production volumes would not make any significant contribution to overall UK supply and we would be swimming against the tide in any event.
Saying we should use a lot of (imported, for the most part) diesel/steel/gas to get a trivially small amount of (certainly in the south of England) oil
not gas - rather than importing it from somewhere it can be produced much more economically - is a bit like saying that just because we technically can grow bananas in the UK, we should do that in preference to importing them from countries with a more appropriate climate (for the time being!). Sheik Yamani said something along the same lines as "let the lowest cost producers do just that".
We are very far from being self-sufficient in food, and yet nobody's making any serious argument that we should bulldoze the place to grow significantly more of our own food (bananas or anything else)...
The truth is that we can and must wean ourselves off fossil fuels as soon as possible, and that takes political will which is sadly lacking (partly because the vested interests have such powerful lobbying capabilities - have you noticed the publicity campaigns [funded by middle eastern interests] trying to convince us all of the merits of "blue" hydrogen?).
We have most of the technology already - we should have upgraded our existing housing stock already, for example - it is quite possible to engineer housing that doesn't need heating/cooling (certainly not to the painful extent as currently) - again, powerful lobby groups have averted government action for too long.